, my old habit can't be realized anymore, as only the number without the decimal places is saved (to assure WMP compatibility). However, if write a "6" (or any higher number) in the rating tag with foobar, it is saved but will never be compatible with WMP. So can the developers please enable the possibility to save floating numbers again, and only write WMP compatible rating tags, if the written rating is [1 2 3 4 5]? This would help me a lot, because I wouldn't have to modify my whole music library to use a custom rating tag or switching to a [1 2 3 ... 10] (from a [1.0 1.5 2.0 2.5 ... 5]) rating.

If the aim is just to avoid the same tag in two different programs so - to repeat a question from another thread - why don't you use fb2k's full capability and use another tag? Let's say: <BENB_RATING>. Via advanced preferences you can make this tag appear in properties dialog and selection info viewer as "rating" what you can use also as name for playlist or facet columns. Is it so important how the name of the frame is?